java-junit SKILL.md skillA
java-junit from marielynneblock/arcanum-artifex is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add marielynneblock/arcanum-artifex/java-junit@git:20260710.0115f49Pins git:20260710.0115f49 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- marielynneblock/arcanum-artifex
- Path
skills/development/java/java-junit/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260710.0115f49, committed Jul 10, 2026
- First version recorded
- May 10, 2026
- Size
- 3,028 bytes
- Repository stars
- 4
- License
- none declared
Get best practices for JUnit 5 unit testing, including data-driven tests.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# JUnit 5+ Best Practices Your goal is to help me write effective unit tests with JUnit 5, covering both standard and data-driven testing approaches. ## Project Setup - Use a standard Maven or Gradle project structure. - Place test source code in `src/test/java`. - Include dependencies for `junit-jupiter-api`, `junit-jupiter-engine`, and `junit-jupiter-params` for parameterized tests. - Use build tool commands to run tests: `mvn test` or `gradle test`. ## Test Structure - Test classes should have a `Test` suffix, e.g., `CalculatorTest` for a `Calculator` class. - Use `@Test` for test methods. - Follow the Arrange-Act-Assert (AAA) pattern. - Name tests using a descriptive convention, like `methodName_should_expectedBehavior_when_scenario`. - Use `@BeforeEach` and `@AfterEach` for per-test setup and teardown. - Use `@BeforeAll` and `@AfterAll` for per-class setup and teardown (must be static methods). - Use `@DisplayName` to provide a human-readable name for test classes and methods. ## Standard Tests - Keep tests focused on a single behaviour. - Avoid testing multiple conditions in one test method. - Make tests independent and idempotent (can run in any order). …
Read the whole file at its exact version.
How to install
mdr add marielynneblock/arcanum-artifex/java-junit@sha256:305f415bb5ae1b59The line at the top of this page pins the label git:20260710.0115f49, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_nxbzw4n2nmikef6y)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between May 10, 2026 and Jul 10, 2026, about one every 20 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260710.0115f49 latest | 2026-07-10 | 0115f49 | 3,028 B | A | view · diff |
| git:20260710.ffb3400 | 2026-07-10 | ffb3400 | 3,027 B | A | view · diff |
| git:20260515.b861afb | 2026-05-15 | b861afb | 3,027 B | A | view · diff |
| git:20260510.f26bcec | 2026-05-10 | f26bcec | 2,981 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3028 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
marielynneblock/arcanum-artifex · 4 stars · license none declared · pushed 2026-09-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_nxbzw4n2nmikef6y GET https://markdownregistry.com/api/v1/resolve?ref=marielynneblock/arcanum-artifex/java-junit GET https://markdownregistry.com/api/v1/blob/305f415bb5ae1b59f92f4db19fb0c15235420c9785fee7368c02b42ebadf8d8f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.